CN107447212A - The surface treatment method of magnesium alloy parts - Google Patents
The surface treatment method of magnesium alloy parts Download PDFInfo
- Publication number
- CN107447212A CN107447212A CN201710407348.6A CN201710407348A CN107447212A CN 107447212 A CN107447212 A CN 107447212A CN 201710407348 A CN201710407348 A CN 201710407348A CN 107447212 A CN107447212 A CN 107447212A
- Authority
- CN
- China
- Prior art keywords
- magnesium alloy
- alloy parts
- treatment method
- surface treatment
- silane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/05—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions
- C23C22/68—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous solutions with pH between 6 and 8
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C2222/00—Aspects relating to chemical surface treatment of metallic material by reaction of the surface with a reactive medium
- C23C2222/20—Use of solutions containing silanes
Abstract
The present invention provides a kind of surface treatment method of magnesium alloy parts, including：Magnesium alloy parts surface is cleaned；Mg alloy surface after the cleaning forms silane film layer.The present invention can form effective overcoat on large-scale or ultra-large type magnesium alloy parts surface, improve the decay resistance of magnesium alloy parts.
Description
Technical field
The present invention relates to technical field of material surface treatment, more particularly to a kind of surface treatment method of magnesium alloy parts.
Background technology
As spacecraft develops to maximization, high accuracy and multifunctional direction, spacecraft payload is continuously increased, space flight
Field increasingly obtains concern both domestic and external to light-duty, high performance material demand.Magnesium and magnesium lithium alloy are because its density is small, intensity
The advantages that high, it is widely used in aerospace product.But magnesium and magnesium lithium alloy corrosion resisting property are bad, it is necessary to carry out surfacecti proteon,
Currently used guard technology includes chemical nickel plating, differential arc oxidation, anodic oxidation, chemical oxidation etc..But above-mentioned technology is fitted
For middle-size and small-size part, lack suitable guard technology for large-scale or ultra-large type magnesium and magnesium lithium alloy part.
The content of the invention
Present invention solves the technical problem that it is to provide the processing method of a kind of large-scale or ultra-large type magnesium alloy parts, can
Effective overcoat is formed on large-scale or ultra-large type magnesium alloy parts surface, improves the decay resistance of magnesium alloy parts.
In order to solve the above problems, the present invention provides a kind of surface treatment method of magnesium alloy parts, including：
Magnesium alloy parts surface is cleaned；
Mg alloy surface after the cleaning forms silane film layer.
Alternatively, the thickness range of the silane film layer is 0.01 ~ 0.5 μm.
Alternatively, the silane film layer is to react to be formed with magnesium alloy surface chemical using the solution containing silane.
Alternatively, the composition of the solution of the silane-containing includes：Silane, first alcohol and water.
Alternatively, the volumetric concentration of the silane is 15-25%, and the volumetric concentration of methanol is 10%.
Alternatively, preparing the technological parameter of the silane film layer includes：Second process time 100-140, temperature 10-30 are Celsius
Degree.
Alternatively, after silane film layer is formed, in addition to curing schedule, the curing schedule are carried out in an oven, solidification
140-160 degrees Celsius of temperature, minute hardening time 50-70.
Alternatively, the cleaning includes：Deoiling step and water-washing step.
Alternatively, the deoiling step is carried out prior to water-washing step, and the deoiling step includes：Solvent degreasing step
With electrochemical deoiling step, organic deoiling step is carried out using aviation gasoline；After the completion of organic deoiling step, using containing
Acid chemical solution carries out electrochemical deoiling.
Alternatively, the chemical solution is by the concentration containing sodium carbonate, sodium metasilicate, sodium phosphate and water, wherein sodium carbonate
30-60g/L, the concentration of sodium metasilicate is 20-30g/L, and the concentration of sodium phosphate is 40-60g/L, and temperature range is 70-80 degrees Celsius,
The time of electrochemical deoiling is 5-10 minutes；The water-washing step includes：The hot water wash step carried out successively and pure water-washing step.
Compared with prior art, the invention has the advantages that：
The present invention has the silane film layer of antiseptic property by forming gold utensil in Mg alloy surface, is remarkably improved the resistance to of metallic matrix
Corrosion, due to after hydrolysis, generating substantial amounts of silicone hydroxyl, the hydroxyl of the light metal surface such as siloxanes and magnesium alloy using silane
Condensation reaction occurs for base, forms silicon oxygen bond, so as to cover one layer of fine and close silane film layer in Mg alloy surface.
Brief description of the drawings
Fig. 1 is the schematic flow sheet of the surface treatment method of the magnesium alloy parts of one embodiment of the invention.
Embodiment
The present invention forms the silane film layer of densification using the mode of chemical reaction on magnesium alloy parts surface, it is possible to increase magnesium
The corrosion resistance of alloy part.
Specifically, the flow of the surface treatment method of the magnesium alloy parts of the one embodiment of the invention with reference to shown in figure 1
Schematic diagram.The method of the invention includes：
Step S1, magnesium alloy parts surface is cleaned；
Step S2, Mg alloy surface after the cleaning form silane film layer.
The present invention after hydrolysis, generates substantial amounts of silicone hydroxyl, the light metal table such as siloxanes and magnesium alloy using silane
Condensation reaction occurs for the hydroxyl in face, forms silicon oxygen bond, so that metal surface covers one layer of fine and close silane film layer, the silicon
The thickness range of alkane film layer is 0.01 ~ 0.5 μm.
As one embodiment, the composition of the solution of the silane-containing includes：Silane, first alcohol and water.Preferably, the silicon
The volumetric concentration of alkane is 15-25%, and the volumetric concentration of methanol is 10%.
The technological parameter of the present invention for preparing the silane film layer includes：Second process time 100-140, temperature 10-
30 degrees Celsius.In a preferred embodiment, the process time for preparing silane oxidation layer is 120 seconds, and temperature is 20 degrees Celsius,
Under such technological parameter, the silane film layer of formation is comparatively dense, and can be advantageous to and follow-up other materials coating
Combination.
In order to further improve the corrosion resistance of silane film layer, after silane film layer is formed, in addition to curing schedule, institute
State curing schedule to carry out in an oven, 140-160 degrees Celsius of solidification temperature, minute hardening time 50-70.Such as the solidification
The temperature of technique is 145 or 155 degrees Celsius, 60 minutes hardening times, further to improve the combination of silane film layer and magnesium alloy.
, it is necessary to be cleaned to the surface of magnesium alloy parts before silane film layer is prepared, the cleaning includes：Oil removing walks
Rapid and water-washing step.
As preferred embodiment, the deoiling step is carried out prior to water-washing step, and the deoiling step includes：It is organic molten
Agent deoiling step and electrochemical deoiling step, organic deoiling step are carried out using aviation gasoline；Completed in organic deoiling step
Afterwards, electrochemical deoiling is carried out using the chemical solution containing acidity.
The chemical solution is by containing sodium carbonate, sodium metasilicate, sodium phosphate and water, the wherein concentration of sodium carbonate is 30-60g/
L, the concentration of sodium metasilicate is 20-30g/L, and the concentration of sodium phosphate is 40-60g/L, and temperature range is 70-80 degrees Celsius, and chemistry removes
The time of oil is 5-10 minutes；The water-washing step includes：The hot water wash step carried out successively and pure water-washing step.
To sum up, the present invention has the silane film layer of antiseptic property by forming gold utensil in Mg alloy surface, is remarkably improved gold
Belong to the corrosion resistance of matrix, due to after hydrolysis, generating substantial amounts of silicone hydroxyl, the light gold such as siloxanes and magnesium alloy using silane
Condensation reaction occurs for the hydroxyl of metal surface, forms silicon oxygen bond, so as to cover one layer of fine and close silane film layer in Mg alloy surface.
Therefore, the technical concepts and features of above-mentioned preferred embodiment only to illustrate the invention, its object is to allow be familiar with this
The personage of item technology can understand present disclosure and implement according to this, and it is not intended to limit the scope of the present invention.It is all
The equivalent change or modification made according to spirit of the invention, it should all be included within the scope of the present invention.
Claims (10)
- A kind of 1. surface treatment method of magnesium alloy parts, it is characterised in that including：Magnesium alloy parts surface is cleaned； Mg alloy surface after the cleaning forms silane film layer.
- 2. the surface treatment method of magnesium alloy parts as claimed in claim 1, it is characterised in that the thickness of the silane film layer Scope is 0.01 ~ 0.5 μm.
- 3. the surface treatment method of magnesium alloy parts as claimed in claim 1, it is characterised in that the silane film layer is to utilize to contain The solution for having silane reacts to be formed with magnesium alloy surface chemical.
- 4. the surface treatment method of magnesium alloy parts as claimed in claim 3, it is characterised in that the solution of the silane-containing Composition includes：Silane, first alcohol and water.
- 5. the surface treatment method of magnesium alloy parts as claimed in claim 4, it is characterised in that the volumetric concentration of the silane For 15-25%, the volumetric concentration of methanol is 10%.
- 6. the surface treatment method of the magnesium alloy parts as described in claim 3 or 4, it is characterised in that prepare the silane film The technological parameter of layer includes：Second process time 100-140,10-30 degrees Celsius of temperature.
- 7. the surface treatment method of magnesium alloy parts as claimed in claim 6, it is characterised in that after silane film layer is formed, Also include curing schedule, the curing schedule is carried out in an oven, 140-160 degrees Celsius of solidification temperature, hardening time 50-70 point Clock.
- 8. the surface treatment method of magnesium alloy parts as claimed in claim 1, it is characterised in that the cleaning includes：Oil removing Step and water-washing step.
- 9. the surface treatment method of magnesium alloy parts as claimed in claim 8, it is characterised in that the deoiling step is prior to water Step progress is washed, the deoiling step includes：Solvent degreasing step and electrochemical deoiling step, organic deoiling step profit Carried out with aviation gasoline；After the completion of organic deoiling step, electrochemical deoiling is carried out using the chemical solution containing acidity.
- 10. the surface treatment method of magnesium alloy parts as claimed in claim 9, it is characterised in that the chemical solution by containing There are sodium carbonate, sodium metasilicate, sodium phosphate and water, the wherein concentration of sodium carbonate is 30-60g/L, and the concentration of sodium metasilicate is 20-30g/L, The concentration of sodium phosphate is 40-60g/L, and temperature range is 70-80 degrees Celsius, and the time of electrochemical deoiling is 5-10 minutes；The water Washing step includes：The hot water wash step carried out successively and pure water-washing step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710407348.6A CN107447212A (en) | 2017-06-02 | 2017-06-02 | The surface treatment method of magnesium alloy parts |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710407348.6A CN107447212A (en) | 2017-06-02 | 2017-06-02 | The surface treatment method of magnesium alloy parts |
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| CN107447212A true CN107447212A (en) | 2017-12-08 |
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| CN201710407348.6A Pending CN107447212A (en) | 2017-06-02 | 2017-06-02 | The surface treatment method of magnesium alloy parts |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000050666A1 (en) * | 1999-02-25 | 2000-08-31 | Hosaka Inc. | Method for treating magnesium-based metal formed article and treating solution therefor |
| CN102453892A (en) * | 2010-11-01 | 2012-05-16 | 嘉兴中科亚美合金技术有限责任公司 | Method for forming silane film on surface of magnesium alloy |
| CN103526194A (en) * | 2013-10-17 | 2014-01-22 | 重庆大学 | Method for performing silanization treatment on surfaces of magnesium and magnesium alloy |
| CN104611706A (en) * | 2015-02-21 | 2015-05-13 | 桂林理工大学 | Corrosion inhibition treatment method for magnesium alloy in sodium chloride solution |
-
2017
- 2017-06-02 CN CN201710407348.6A patent/CN107447212A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000050666A1 (en) * | 1999-02-25 | 2000-08-31 | Hosaka Inc. | Method for treating magnesium-based metal formed article and treating solution therefor |
| CN102453892A (en) * | 2010-11-01 | 2012-05-16 | 嘉兴中科亚美合金技术有限责任公司 | Method for forming silane film on surface of magnesium alloy |
| CN103526194A (en) * | 2013-10-17 | 2014-01-22 | 重庆大学 | Method for performing silanization treatment on surfaces of magnesium and magnesium alloy |
| CN104611706A (en) * | 2015-02-21 | 2015-05-13 | 桂林理工大学 | Corrosion inhibition treatment method for magnesium alloy in sodium chloride solution |
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Application publication date: 20171208 |
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